Answer:
There is one 12/4 in 3.
Step-by-step explanation:
12/4 = 3
4/4 + 4/4 + 4/4 = 12/4 = 3
it’s system of substitutions ?
so try
a = 2
b = 5
Y = f(3f - 4g + 3) +7g(3f - 4g + 3)
= 3f^2 - 4fg + 3f + 21fg - 28g^2 + 21g
= 3f^2 + 3f + 17fg + 21g - 28g^2
